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1SVR740720R1400 ABB CM-MSS.11P Thermistor Motor Protection Relay
ABB CM-MSS.11P thermistor motor protection relay 1SVR740720R1400 with one PTC sensor circuit, dynamic interrupted-wire detection, non-volatile fault storage, 24–240 V AC/DC supply and 1 normally open plus 1 normally closed output contact.
£81.57
Why Choose the ABB CM-MSS.11P Thermistor Motor Protection Relay?
The ABB CM-MSS.11P is a reliable thermistor motor protection relay designed to monitor PTC temperature sensors installed in electric motor windings. Supplied under ABB order code 1SVR740720R1400, it belongs to the ABB CM-MSS thermistor motor protection relay series and provides direct thermal supervision to help protect motors against damaging overtemperature conditions.
The CM-MSS.11P monitors one sensor circuit and incorporates dynamic interrupted-wire detection and non-volatile fault storage. These functions enable the relay to supervise both motor temperature and the integrity of the connected sensor circuit, providing dependable protection for industrial motors and machinery.
Operating from a wide 24–240 V AC/DC control supply, the CM-MSS.11P provides one normally open and one normally closed output contact. Automatic reset functionality, ATEX approval and maintenance-free push-in screwless terminals make the relay particularly suitable for compact industrial control panels and motor control systems.
Key Advantages
- Reliable PTC thermistor motor temperature monitoring.
- One sensor circuit for direct motor winding temperature supervision.
- Dynamic interrupted-wire detection helps identify sensor circuit faults.
- Non-volatile fault storage retains fault information.
- Automatic reset functionality for straightforward motor protection circuits.
- Wide 24–240 V AC/DC control supply supports flexible integration.
- 1 normally open + 1 normally closed contact for control and signalling.
- ATEX-approved thermistor motor protection functionality.
- Push-in screwless terminals simplify installation and maintenance.
Key Features
- ABB CM-MSS thermistor motor protection relay series.
- ABB order code 1SVR740720R1400.
- One PTC sensor circuit.
- Dynamic interrupted-wire detection.
- Non-volatile fault storage.
- Automatic reset operation.
- 24–240 V AC/DC rated control supply voltage.
- 1 n/o + 1 n/c output contact.
- Three LED indicators for operating and status indication.
- ATEX approved.
- Push-in / screwless terminal technology.
- Compact DIN rail format for industrial control panels.
Reliable PTC Thermistor Protection for Electric Motors
PTC thermistors installed in motor windings provide direct thermal supervision by changing resistance as the winding temperature approaches the sensor response temperature. The ABB CM-MSS.11P evaluates the connected sensor circuit and changes the state of its output contacts when an overtemperature condition is detected, allowing a motor contactor, alarm or other control device to respond.
Dynamic interrupted-wire detection adds supervision of the thermistor wiring itself, while non-volatile fault storage preserves fault information. This combination makes the CM-MSS.11P suitable for industrial applications where reliable motor thermal protection and sensor-circuit monitoring are required.
Typical Applications
- Industrial motors equipped with PTC thermistors.
- Pumps, fans and ventilation equipment.
- Compressors and refrigeration machinery.
- Conveyors and material handling systems.
- Machine tools and production machinery.
- Motor control centres and electrical control panels.
- Industrial installations requiring ATEX-approved thermistor motor protection.
Technical Specifications
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| Reset Type | Automatic | |
|---|---|---|
| Monitoring Function | Temperature / thermistor | |
| Series | CM-MSS | |
| ABB order code | 1SVR740720R1400 | |
| Product group | 310921-Measuring & Monitoring Relays | |
| Product type | Thermistor motor protection relay | |
| Sensor type | PTC thermistor | |
| Number of sensor circuits | 1 | |
| Interrupted-wire detection | Dynamic | |
| Fault storage | Non-volatile | |
| Reset function | Automatic | |
| Rated control supply voltage | 24–240 V AC/DC | |
| Outputs | 1 normally open + 1 normally closed contact | |
| Number of LEDs | 3 | |
| Terminal type | Screwless push-in terminals | |
| Maximum output circuit operating voltage (UL/CSA) | 300 V AC | |
| UL/CSA contact rating | B300 | |
| Approval | ATEX approved | |
| Operating temperature | -25 to +60 °C | |
| Storage temperature | -40 to +85 °C | |
| Mounting | DIN rail | |
| UPC / EAN | 4013614496523 |
Frequently Asked Questions
What is the ABB CM-MSS.11P used for?
The CM-MSS.11P is used to monitor PTC temperature sensors installed in electric motor windings, helping protect motors against excessive operating temperatures.
How many sensor circuits does the CM-MSS.11P have?
The CM-MSS.11P provides one PTC thermistor sensor circuit for motor temperature monitoring.
What supply voltage does the CM-MSS.11P require?
The CM-MSS.11P operates from a wide 24–240 V AC/DC control supply.
What outputs does the CM-MSS.11P provide?
The relay provides one normally open and one normally closed output contact for integration with motor shutdown, alarm and control circuits.
Does the CM-MSS.11P monitor the thermistor wiring?
Yes. The CM-MSS.11P includes dynamic interrupted-wire detection, helping detect an interruption in the connected sensor circuit.
Trusted ABB Motor Protection Technology
ABB CM-MSS thermistor motor protection relays provide dependable PTC temperature monitoring and sensor-circuit supervision to help protect electric motors in industrial machinery, automation and motor control applications.
